Gas-engine.



J. B. JENSEN.

GAS ENGINE. APPLICATION FILED MAY 23, 1912. 1,094,658. Patented Apr. 28, 1914.

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J. B. JENSEN.

GAS ENGINE.

APPLICATION FILED MAY 23, 1912. 21 69 5 658u Patented Apr. 28, 1914.

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UNTTED STATES PATENT O FFIGE.

JULIAN B. JENSEN, OF OAKLAND, CALIFORNIA.

GAS-ENGINE.

1&9 13858).

To (ZZZ 1(7L077Z it may concern:

Be it known that I, JULIAN B. JENSEN, citizen of the United States, residing at Oak land, in the county of Alameda and State of California, have invented certain new and useful Improvements in Gas-Engines, of which the following is a specification.

My present invention relates to internal combustion engines and more particularly to intake and exhaust control of the cylinder thereof, by means of a revo-luble valve disposed exteriorly of the cylinder.

The principal objects of my invention are to provide a simple and efficient valve and actuating means therefor, which permits ingress of the explosive fluid to the cylinder and egress of the waste product of combustion at predetermined periods, and enables the engine to be reversed.

A further object of my invention is to provide efficient packing means for the revoluble valve members.

In the drawings, forming a part of this specification:Figure 1 is a central, vertical, sectional view through a gas engine and the control valve thereof, embodying my invention. Fig. 2 is a cross sectional view on the lines 22 of Fig. 1. Fig. 3 is a cross sectional view through the valve seat, taken on the line 33 of Fig. 2. Fig. 4 is a side elevation of what I hereinafter term revoluble drum valve tailed sectional view of packing strips and resilient means associated therewith, used in connection with the valve.

Similar characters refer to similar parts throughout the several views.

The engine includes a suitable cylinder 1, a trunk piston 2 therein, crank shaft 3, and connecting rod 1, operatively connecting the piston and crank shaft to transmit movement of the former to the latter, all of which may be of any suitable construction.

A pinion 5 is keyed to shaft 3 and is adapted to coact with a gear 6 revolubly carried by the crank case 7 of the engine. The said casing is provided with a bearing 8 adapted to receive a shaft 9, carrying a bevel gear 10 which co-meshes with a bevel gear 11 actuated by the said gear 6. Although I have shown and described the shaft 9 and gear (3 as carried by crank case 7, this is merely for economical purposes and to render the device compact, and any other suitable means may be used for supporting these members without departing from the Specification of Letters Patent.

Application filed May 23, 1912.

Fig. 5 is a de- Patented Apr. 28, 19141. Serial No. 699,136.

spirit of my invention. The motion transmitting means comprising pinion 5, gear 6 and bevels 11 and 10, is such that the latter has imparted thereto one revolution to et revolutions of the former.

The cylinder is provided with jacketing 12, and I provide, preferably integral with such jacketing, as shown in Fig. 2 of the drawing, a cylindrical valve seat 13 exteriorly of the cylinder and preferably to one side thereof, which is surrounded by said jacketing.

Referring more specifically to valve seat 13 and associated parts, the cylindrical bore of the valve seat has open thereto an inlet port 14; exhaust ports 15 and 16, diametrically opposite each other and having their axes at right angle to the axis of the inlet port 14, and ports 17 and 18 intermediate said ports 15 and 16, and at the opposite side of the valve seat from inlet 14, said ports 17 and 18 being disposed with their axes at an angle of 90 to each other, and 45 to the axis of the adjacent exhaust port. The ports 15 and 16 conveniently lead to a common exhaust duct 19, while the ports 17 and 18 lead separately to the cylinder 1. All of the ports open to the seat 13 are preferably elongated and are disposed longitudinally of the seat. An oscillatable cylindrical shell valve 20 is adapted to oscillate in said valve seat 13 and is provided with an actuating arm 21 at one end, projecting from the seat, this arm being preferably carried by an annulus 22, which in turn is secured to a projecting portion of the valve 20. Mechanism connected to arm 21 oscillates the valve 20 through 15 degrees of arc. This cylindrical shell valve 20 has three ports, 23, 24 and 25, the former two being spaced apart from each other with their axes at right angles to each other so that the port 23 may open to port 14 while the port 24 is open to port 15, as shown in Fig. 2 of the drawing, or the said shell may be rotated to position the port 23 open to port 16, the port 24 open to port 141, and port 25 open to port 17, and the said ports 17 and 18 are so disposed in the first described position of the valve 20, that as shown in the drawing, the said port 25 opens to port 18, and in the second described position of the valve 20, the said port 25 opens to port 17. The valve 20 is also slotted longitudinally as at 26, adjacent the ports therein, to receive packing bars 27, more specifically shown in Fig. 5 of the drawing, which lie flush with or project slightly with respect to the external and internal periphery of the valve, said bars being separated by springs 28 disposed in sockets 29 formed in the said bars. A bearing cap 30 is secured to the shell valve 20, one at each end thereof, and these caps, except for the hearing apertures, close said cylindrical valve seat 13 at its ends. ll ithin said cylindrical shell valve 20, a revoluble drum valve 31 is provided, said drum valve being held against longitudinal move,

ment by hearing against said bearing caps 80 and a stub shaft 81 is adapted to fit in the aperture of one of the bearing caps, while a coupling stub shaft 32 fits into the other hearing cap 30, that nearest the shaft 9. This coupling shaft 32 receives shaft 9 to which it is keyed in any suitable manner, so that movement of the shaft 9 is imparted to the revoluble drum valve. Annular packing members 33 are carried by said valve 31 which bear against the internal pe riphery of shell valve 20, while packing bars 27 of the latter valve seat bear against the periphery of the drum valve 31.

The drum valve 31 is provided with two transversely extending ports 3 1 and which are adapted to connect the port 25 and first one and then the other of the ports and 24 of the shell valve 20. It will be understood that port 23 registers with inlet port 1 1 at proper times during the running of the engine when it is rotating in one direction and that port 2 1 registers with inlet port 1 1 at proper times when the rotation of the engine is to be reversed. lVhen the mechanism operating valve 20 is so set that port 23 cooperates with inlet port 1% and port 2 1- cooperates with outlet 15 and port 25 with cylinder port 18, then the engine operates in one direction, but if cylinder port 2% cooperates with inlet 14 then port 23 cooperates with outlet 16 and port with cylinder port- 17, then the engine operates in the other direction. Of the ports 3 1; or the former is shown in Fig. 2 serving as a conductor of fuel from the inlet port 1 1 to the cylinderport 18. This port 34 upon further movement of the drum valve 31, forms a counnunication with port 525 and one of the exhaust ports 15 or 16, according to the position of shell valve 20. Upon further rotation of valve 31 port 35 is brought into the position of port 3 1- as shown in Fig. 2. The r' its 3% and 35 act successively for ingresr 1 F conducting means withl respect to the cylinder 1.

The operation of the device is as follows :;issuming that the relative position of the shell valve 20 to the valve seat 18 is such as shown in Fig. 2 of the drawings, and the drum valve rotating in the direction. indicated by arrows, in Figs. 1 and 2,

incense the engine is at the beginning of its induction stroke and the comlinistible fluid enters the cylinder 1 through ports 1 1-, 23, 3 1, 25 and 18. Communication between these several ports is provided for throughout oneeighth of a revolution of the drum valve at the end of the induction stroke, port 34L- passes ports and 25 and so shuts the cylinder against ingress or egress of fluid for the next quarter of a revolution of the drum valve 31. During this period of closure, the piston compresses the charge, explosion taking place and the piston is forced forwardly. At the end of the power stroke, a passage for waste products of combustion is provided through ports 18, 25, 31 (the same port as previously conducted the charge) 24, and 15, to the exhaust 19. This passage is open until the end of the exhaust stroke, whereupon it is closed, the drum valve 31 having made one-half of the revolution. Port next provides passage between ports 23 and 25 and the same cycle is repeated, except the port 35 serves for inlet to and exhaust from the cylinder 1 during the successive induction and exhaust strokes. When it is desired to reverse the engine, lever 21 is actuated to advance the mean or average position of valve 20 4L5 degrees in the direction of rotation of the valve 31, so that ports 35 and 3 1 may cooperate with port 17, as previously mentioned, with port 17, and ports 23 and 2 L with ports 16 and 1 1, respectively, whereupon port 16 serves as exhaust, but the port 11; is always the inlet.

Any suitable means may be used for shift ing the spark connection to operate in conjunction with the valve' means for successfully operating the engine, such spark producing and control mechanism not being shown in the drawing, inasmuch as it forms no part of the present invention.

I claim:

1. A control valve for gas engines comprising in combination, a valve seat having a cylindrical bore and an inlet port, exhaust ports diametrically opposite each other with their axes at right angles to the axis of said inlet port, and cylinder ports for communication with the engine cylinder, said cylinder ports being disposed intermediate said exhaust ports with their axes substantially at an angle of 90 to each other and to the axes of the adjacent exhaust port; a cylindrical shell valve os-cillatable within said valve seat and having ports with their axes at substantially right angles to each other, adapted to form communication with said inlet ports and either exhaust port of said valve seat, and a port with its axis at substantially 135% with respect to the said first mentioned ports of said shell valve adapted to communicate with either of said cylinder ports of said valve seat; and a drum valve revolublewithin said cylindrical shell valve provided with two transversely extending ports, each adapted to form communication between the said port in said shell valve open to the engine cylinder and said port in said shell valve open to the intake port of said valve seat, and successively to form communication with said port in said shell valve open to the engine cylinder and the said port in said shell valve open to an exhaust port in said valve seat, said ports in said drum valve acting alternately, substantially as and for the purpose set forth.

In combination with a gas engine including a cylinder, a piston therefor, a crank shaft, and means operatively connecting said piston and said crank shaft, of a valve seat having a cylindrical bore with an inlet port. exhaust ports diametrically opposite each other with their axes at right angles to the axis of said inlet port, and cylinder ports for communication with the engine cylinders, said cylinder ports being disposed intermediate said exhaust ports with their axes at substantially an angle of 90 to each other and 45 to the axis of the adjacent exhaust port; a cylindrical shell valve oscillatable within said valve seat and having ports with their axes at substantially right angles to each other, adapted to form communication with said inlet ports and either exhaust port of said valve seat, and a port with its axis at sub stantially 135% with respect to the first mentioned ports of said shell valves, adapted to communicate with each of said cylinder ports of said valve seat; a drum valve revoluble within said cylindrical shell valve provided with two transversely extending ports, each adapted to form communication between the said ports in said shell valve open to the engine cylinder and the said ports in said valve shell open to the inlet port of said valve seat, and successively form communication with the said port in said valve seat to open to the engine cylinder and the said port in said shell valve open to said exhaust port in the valve seat, the ports in said drum acting alternately; and, mechanism operatively connected with the said crank shaft of said engine and said drum valve to impart to the latter one complete revolution at four revolutions of said crank shaft, substantially as and for the purpose set forth.

3. A control valve for gas engines comprising in combination, a valve seat having a bore with an inlet port, two exhaust ports, and two cylinder ports for communication with said engine cylinder; a shell valve rotatable in said valve seat and provided with three ports, the relative position of said ports being such that with one port open to one of said cylinder ports of said valve seat,

the other two ports are open respectively to the inlet and one of the exhaust ports of said valve seat, and when said shell valve is rotated to open said first mentioned ports thereof to open to the other cylinder ports in said valve seat, said second mentioned ports of said shell valve are opened respectively to the other exhaust port of said valve seat and said inlet port thereof; and a drum valve rotatable within said shell valve and provided with conducting means for alternately forming a communication between the said first mentioned port of said shell valve and the port of the latter open to the inlet port of said valve seat, and intermittently forming a communication between said first mentioned valve of said shell valve and the port thereof open to the exhaust port of said valve seat, substantially as and for the purpose set forth.

4. In combination with a gas engine including a cylinder, a piston therefor, a crank shaft and means operatively connecting said piston and crank shaft, a valve seat having a bore with an inlet port, two exhaust ports and two cylinder ports communicating with the engine cylinder, a shell valve rotatable within said valve seat and provided with three ports, the relative position of said ports being such that with one port open to one of the said cylinder ports of said valve seat, the other ports are open respectively to the inlet and one of the exhaust ports of said valve seat, and when said shell valve is rotated to open said first mentioned port thereof to open to the other cylinder ports of said valve, said second mentioned ports of said shell valve are opened respectively to the other exhaust port of said valve seat and said inlet port thereof; a drum valve rotatable within said shell valve and provided with means for alternately forming a communication between the said first mentioned port of said shell valve and the port of the latter opened to the inlet port of said valve seat, and intermittently forming a communication between said first mentioned port of said shell valve and the port thereof open to the exhaust port of said valve seat; and, means operatively connecting said crank shaft and drum valve to rotate the latter for controlling operation consistent with the induction, compression, power and exhaust strokes of the engine.

5. In a control valve for gas engines, the combination of a valve seat having inlet, exhaust and cylinder ports leading to the bore thereof, a cylindrical shell valve oscillatable in said valve seat and provided with ports adapted to be opened with the said ports in said valve seat and having longitudinally extending slots, a drum valve rotatable in said shell valve adapted to control communication between said ports in the latter, a plurality of pairs of packing bars adapted to fit in the said slots in said shell valve and one bar of each pair being adapted to bear against the internal periphery of said valve seat and the other bar of each pair being adapted to bear against the periphery of said. drum valve, and yieldable means,interposed between said bars of each pair, substantially as and for the purpose forth.

In combination with a gas engine including a cylinder, a piston therefor, a crank shaft and means operatively connecting said crank shaft and piston, of a valve seat having inlet, exhaust and cylinder connecting ports in the bore thereof, a shell 'alve oscillatable in said valve seat and provided with ports adapted to be opened with the said ports in said valve seat, a drum valve rotatable in said shell valve adapted to control coinn'innication between the ports of the latter, bearing caps carried by said shell valve at each end of said valve seat, stub shafts carried by said drum valve and fitting in the said bearings of said bearing caps, and means ope 'atively connecting one of said stub shafts and the said crank shaft U opies of said engine to impart movement of the latter to the former, substantially as and for the purpose set forth.

7. In combination with a gas engine including a cylinder, a piston therefor, a crank shaft and means operatively connecting said crank shaft and piston, of a valve seat having inlet, exhaust and cylinder connecting ports in the bore thereof, a shell valve oscillatable in said valve seat and provided with ports adapted to be opened with the said ports in said valve seat, a drum valve rotatable in said shell valve and adapted to control communication between the ports of the latter, and means operatively connecting the drum. valve and crank shaft of said engine to impart rotary movement to the former, substantially as and for the purposes set forth.

In testimony whereof I aflix my signature in presence of two witnesses.

J ULIAN B. JENSEN.

ll itiiesses F. P. Scrinononn,

W. A. STOCK.

of this patent may he obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. 0. 

